CN103408201B - The treatment process of trade effluent during silicon wafer mortar reclaims - Google Patents
The treatment process of trade effluent during silicon wafer mortar reclaims Download PDFInfo
- Publication number
- CN103408201B CN103408201B CN201310387385.7A CN201310387385A CN103408201B CN 103408201 B CN103408201 B CN 103408201B CN 201310387385 A CN201310387385 A CN 201310387385A CN 103408201 B CN103408201 B CN 103408201B
- Authority
- CN
- China
- Prior art keywords
- waste
- water
- waste water
- treatment
- quality
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000000034 method Methods 0.000 title claims abstract description 51
- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 24
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 15
- 239000010703 silicon Substances 0.000 title claims abstract description 15
- 239000002351 wastewater Substances 0.000 claims abstract description 145
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 57
- 238000005189 flocculation Methods 0.000 claims abstract description 24
- 230000016615 flocculation Effects 0.000 claims abstract description 24
- 238000001914 filtration Methods 0.000 claims abstract description 15
- 238000004062 sedimentation Methods 0.000 claims abstract description 15
- 230000020477 pH reduction Effects 0.000 claims abstract description 10
- 239000010786 composite waste Substances 0.000 claims description 49
- 241000894006 Bacteria Species 0.000 claims description 21
- 239000010802 sludge Substances 0.000 claims description 19
- 239000000693 micelle Substances 0.000 claims description 16
- 241000233866 Fungi Species 0.000 claims description 14
- 239000000701 coagulant Substances 0.000 claims description 14
- 239000000126 substance Substances 0.000 claims description 14
- 241001148470 aerobic bacillus Species 0.000 claims description 13
- 229910052760 oxygen Inorganic materials 0.000 claims description 13
- 239000001301 oxygen Substances 0.000 claims description 13
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 13
- VSCWAEJMTAWNJL-UHFFFAOYSA-K Aluminium chloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 12
- 238000011010 flushing procedure Methods 0.000 claims description 12
- 239000003456 ion exchange resin Substances 0.000 claims description 12
- 229920003303 ion-exchange polymer Polymers 0.000 claims description 12
- 238000005554 pickling Methods 0.000 claims description 12
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 11
- 235000015450 Tilia cordata Nutrition 0.000 claims description 11
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 11
- 239000004571 lime Substances 0.000 claims description 11
- 239000002699 waste material Substances 0.000 claims description 11
- 230000000813 microbial Effects 0.000 claims description 10
- 238000005520 cutting process Methods 0.000 claims description 9
- 239000003814 drug Substances 0.000 claims description 8
- 229920002401 polyacrylamide Polymers 0.000 claims description 8
- 238000009287 sand filtration Methods 0.000 claims description 8
- 238000004064 recycling Methods 0.000 claims description 7
- 238000001223 reverse osmosis Methods 0.000 claims description 7
- RUTXIHLAWFEWGM-UHFFFAOYSA-H Iron(III) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 claims description 6
- 229940032950 ferric sulfate Drugs 0.000 claims description 6
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 230000003647 oxidation Effects 0.000 claims description 6
- 238000007254 oxidation reaction Methods 0.000 claims description 6
- 239000006004 Quartz sand Substances 0.000 claims description 5
- 238000005273 aeration Methods 0.000 claims description 5
- 239000003610 charcoal Substances 0.000 claims description 5
- 230000001112 coagulant Effects 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 239000007900 aqueous suspension Substances 0.000 claims description 4
- 229910021419 crystalline silicon Inorganic materials 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 4
- 150000002500 ions Chemical class 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 238000002203 pretreatment Methods 0.000 claims description 4
- 210000002356 Skeleton Anatomy 0.000 claims description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 238000000855 fermentation Methods 0.000 claims description 3
- 230000004151 fermentation Effects 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- 244000005700 microbiome Species 0.000 claims description 3
- 239000005416 organic matter Substances 0.000 claims description 3
- 239000002244 precipitate Substances 0.000 claims description 3
- 230000001376 precipitating Effects 0.000 claims description 3
- 239000002253 acid Substances 0.000 abstract description 7
- 238000011084 recovery Methods 0.000 abstract description 6
- 230000001351 cycling Effects 0.000 abstract description 4
- 238000002156 mixing Methods 0.000 abstract description 4
- 239000003513 alkali Substances 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 238000009776 industrial production Methods 0.000 abstract description 3
- 238000000746 purification Methods 0.000 abstract description 3
- 241000276438 Gadus morhua Species 0.000 abstract 1
- 235000019516 cod Nutrition 0.000 abstract 1
- 230000037250 Clearance Effects 0.000 description 9
- 230000033228 biological regulation Effects 0.000 description 9
- 230000035512 clearance Effects 0.000 description 9
- 239000003795 chemical substances by application Substances 0.000 description 7
- 238000004065 wastewater treatment Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- 239000007787 solid Substances 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 3
- 150000001412 amines Chemical class 0.000 description 3
- 239000010842 industrial wastewater Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000003801 milling Methods 0.000 description 3
- -1 polypropylene Polymers 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 102000010637 Aquaporins Human genes 0.000 description 2
- 108010063290 Aquaporins Proteins 0.000 description 2
- 238000005276 aerator Methods 0.000 description 2
- 230000001580 bacterial Effects 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 230000003301 hydrolyzing Effects 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 241001086438 Euclichthys polynemus Species 0.000 description 1
- 244000052616 bacterial pathogens Species 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 238000000386 microscopy Methods 0.000 description 1
- 239000010812 mixed waste Substances 0.000 description 1
- 230000003472 neutralizing Effects 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 230000001105 regulatory Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Abstract
The present invention relates to the treatment process of trade effluent in the recovery of a kind of silicon wafer mortar.Be intended to utilize the method and system to accomplish recovery to the trade effluent of silicon wafer mortar and purification.In the present invention, trade effluent is through classifying after mixing, successively through Wastewater Pretreatment, flocculation sediment process, anaerobic treatment, aerobic treatment, secondary sedimentation, acidification hydrolization, the aerobic filtration of high-density, eventually heavy shallow lake and continuation advanced treatment, reach useless water purification.The invention has the advantages that can by containing acid and alkali corrosion, a large amount of trade effluents that COD content is high, and after above-mentioned steps advanced treatment, recycle applications is in industrial production, by trade effluent cycling and reutilization, and saving water resource.
Description
Technical field
The present invention relates to technical field of waste water processing, be specifically related to the treatment process of trade effluent in the recovery of a kind of silicon wafer mortar.
Background technology
Sun power crystal silicon chip is the base mateiral of photovoltaic industry, crystal silicon chip can produce a large amount of waste mortars in the process of dicing, need to recycle, the recycling of waste mortar needs to carry out the process such as solid-liquid separation and chemical purification to wherein useful cutting liquid and cutting blade material, comprises and adds acid elution to material in waste mortar, adds neutralizing treatment, washes the processes such as classification, extracting and separating, pH regulator, ion-exchange removal of impurities, distillation drying.All a large amount of trade effluents will be produced in these processes.According to statistics, from waste mortar, often reclaim one ton of cutting blade material need produce about 30 ~ 50 tons of trade effluents; Often reclaim one ton of cutting liquid and need produce about 10 tons of trade effluents.This is great waste to water resources.
And the trade effluent reclaiming silicon wafer mortar has the feature of oneself, the feature of this trade effluent is that acid and alkali corrosion is strong, COD(chemical oxygen demand (COD)) content is high.Its pH value is minimum is less than 2, presents higher acidity; The highlyest be greater than 12, present higher alkalescence; In its water, COD value is up to 10000 ~ 20000 mg O
2/ L, presenting water body, to be subject to organism highly polluted.
In the process field of silicon wafer mortar, in Chinese patent literature, publication number is that CN102976323A name is called the recovery process disclosing a kind of waste mortar in the patent of wastewater treatment equipment, this technique mainly to a high efficiency extraction of the useful matter contained in waste mortar itself, facilitates later use.But do not provide solution to the pollution of trade effluent water body itself in prior art, China is that water resources compares the country lacked, and the cycling and reutilization of water resources seems particularly important.Resource recycling utilization process is carried out to a large amount of trade effluents that the sector produces, get rid of likely to the material that water body pollutes, both can avoid polluting ecotope, the consumption of enterprise to tap water resource can also be reduced simultaneously, reduce enterprise's production and operation cost, reach the object of energy-saving and emission-reduction, waste water reclaiming recycle.
Summary of the invention
The present invention aims to provide a kind for the treatment of process being applicable to trade effluent in the silicon wafer mortar recovery of the trade effluent water quality situation of silicon wafer mortar.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
Design the treatment process of trade effluent in the recovery of a kind of silicon wafer mortar, comprise the steps:
(1) Wastewater Pretreatment: the pickling waste waters produced in crystalline silicon cutting waste mortar recycling process, alkali-wash waste water and the categorised collection of ion exchange resin flushing waste water are deposited, again pickling waste waters, alkali-wash waste water and ion exchange resin flushing waste water are mixed, obtain composite waste A, the volume ratio of described pickling waste waters, alkali-wash waste water and ion exchange resin flushing waste water is 1:0.5 ~ 1:1 ~ 1.5, then regulate composite waste pH value to 7 ~ 9, and Air Exposure is carried out to composite waste A;
(2) flocculation sediment process: add flocculation medicament in composite waste A, stirs 10 ~ 30 minutes, obtains composite waste B under the condition of 30 ~ 60 revs/min;
(3) anaerobic treatment: anerobe active sludge is mixed in composite waste B by the mass ratio of 0.5 ~ 3:100, the larger molecular organics being 200 ~ 1000 by composite waste B middle-molecular-weihydroxyethyl is degraded to molecular weight lower than the low molecule organic matter of 100, obtains composite waste C;
(4) aerobic treatment: under the aeration condition of dissolved oxygen content 0.2 ~ 0.5 mg/L, utilize with wastewater quality than the aerobic bacteria active sludge being 0.5 ~ 2:100 decompose 10 ~ 15 little time, the organism removed in composite waste C, obtain composite waste D;
(5) secondary sedimentation: in flow lifting type settling tank, secondary sedimentation is carried out to composite waste D, composite waste D enters from body bottom, pond, after the Time Continuous water inlet of 8 ~ 12 hours, removes precipitating sludge, obtains clarified wastewater A;
(6) acidification hydrolization: the small organic molecule, the methane and carbon dioxide gas that each organism in upper step gained clarified wastewater A are converted into incomplete oxidation through microbial hydrolytic, 8 ~ 12 hours fermentation, reduces chemical oxygen demand (COD) content to 200 mg O in waste water
2/ below L, obtain clarified wastewater B, wherein, described microorganism is micelle bacterium and thread fungus, take thread fungus as skeleton, micelle bacterium is attached on thread fungus, and micelle bacterium proportion is greater than thread fungus, micelle bacterium reaches 50% ~ 80% of microbial total quantity, and hyphomycetic quantity accounts for 10% ~ 20% of microbial total quantity;
(7) the aerobic filtration of high-density: filler enrichment aerobic bacteria in the aerobic filtering basin body of high-density, the concentration of aerobic bacteria mud is 5000 mg/L ~ 8000 mg/L, clarified wastewater B is under the effect of this high-density aerobic bacteria, the organism for the treatment of step (6) non-complete oxidation, organism in clarified wastewater B is divided completely and takes off, obtain clarified wastewater C;
(8) whole heavy shallow lake: caused in flow lifting type settling tank by clarified wastewater C and precipitate, waste water enters from body bottom, pond, after the Time Continuous water inlet of 8 ~ 12 hours, makes chemical oxygen demand (COD) in waste water drop to 50 mg O
2/ below L, going out water suspension is 10 mg/below L, obtains clarified wastewater D;
(9) advanced treatment is continued: clarified wastewater D is caused sandfiltration pot, successively through meticulous quartz sand filtration with after charcoal absorption, get rid of the impurity in water, again through RO reverse osmosis equipment, remove charged ion, organism, colloidal particle and bacterium in water, what obtain utilizing purifies waste water, or can the purifying waste water of reuse.
In the present invention, waste water takes jet or blower fan Air Exposure when pH value regulates, in step (2), flocculation medicament is the mixture of coagulating agent lime and polyacrylamide flocculant, the quality of coagulating agent lime accounts for 0.1 ~ 0.3% of composite waste A quality, the quality of polyacrylamide accounts for 0.002 ~ 0.008% of composite waste A quality, or flocculation medicament is the mixture of coagulant polymeric aluminium chloride and polymeric ferric sulfate flocculant, the quality of coagulant polymeric aluminium chloride accounts for 0.1 ~ 0.3% of composite waste A quality, the quality of bodied ferric sulfate accounts for 0.01 ~ 0.03% of composite waste A quality.
Pressure-filtering process in the present invention is realized by plate type pressure filter.
Beneficial effect of the present invention is:
Can by containing acid and alkali corrosion, a large amount of trade effluents that COD content is high, after step advanced treatment of the present invention, recycle applications is in industrial production, by trade effluent cycling and reutilization, saving water resource.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
Embodiment
Embodiment 1 one kinds of Industrial Wastewater Treatment and resource recycling Application way, see Fig. 1, comprise the steps:
(1) Wastewater Pretreatment: by the pickling waste waters produced in crystalline silicon cutting waste mortar recycling process, alkali-wash waste water and the categorised collection of ion exchange resin flushing waste water are deposited, again by pickling waste waters, alkali-wash waste water and the mixing of ion exchange resin flushing waste water, obtain composite waste A, described pickling waste waters, the volume ratio of alkali-wash waste water and ion exchange resin flushing waste water is 1:0.5 ~ 1:1 ~ 1.5, such as: pickling waste waters, the volume ratio of alkali-wash waste water and ion exchange resin flushing waste water is 1:0.5:1, pickling waste waters, the volume ratio of alkali-wash waste water and ion exchange resin flushing waste water is 1:1:1.5, pickling waste waters, the volume ratio of alkali-wash waste water and ion exchange resin flushing waste water is 1:0.5:1.5, then composite waste pH value to 7 ~ 9 are regulated, such as: 7, 7.5, 8.8, 9, and Air Exposure is carried out to composite waste A,
(2) flocculation sediment process: add flocculation medicament in composite waste A, stir 10 ~ 30 minutes under the condition of 30 ~ 60 revs/min, such as: under the condition of 60 revs/min stir 10 minutes, under the condition of 30 revs/min stir 30 minutes, under the condition of 45 revs/min stir 20 minutes, obtain composite waste B;
(3) anaerobic treatment: anerobe active sludge is mixed in composite waste B by the mass ratio of 0.5 ~ 3:100, such as: the anerobe active sludge of composite waste B quality 0.5%, 1%, 2.5% or 3% is added in composite waste B, make molecular weight be 200 ~ 1000 larger molecular organics be degraded to molecular weight lower than the low molecule organic matter of 100, obtain composite waste C;
(4) aerobic treatment: under the aeration condition of dissolved oxygen content 0.2 ~ 0.5 mg/L, such as: under the aeration condition of 0.2 mg/L, 0.3 mg/L, 0.35 mg/L, 0.4 mg/L, 0.45 mg/L, 0.5mg/L, utilize with wastewater quality than the aerobic bacteria active sludge being 0.5 ~ 2:100 decompose 10 ~ 15 little time, the organism removed in composite waste C, obtain composite waste D;
(5) secondary sedimentation: in flow lifting type settling tank, secondary sedimentation is carried out to composite waste D, composite waste D enters from body bottom, pond, after the Time Continuous water inlet of 8 ~ 12 hours, removes precipitating sludge, obtains clarified wastewater A;
(6) acidification hydrolization: the small organic molecule, the methane and carbon dioxide gas that each organism in upper step gained clarified wastewater A are converted into incomplete oxidation through micelle bacterium and thread fungus microbial hydrolytic, 8 ~ 12 hours fermentation, reduces chemical oxygen demand (COD) content to 200 mg O in waste water
2/ below L, obtains clarified wastewater B; Wherein, described microorganism is micelle bacterium and thread fungus, take thread fungus as skeleton, micelle bacterium is attached on thread fungus, micelle bacterium proportion is greater than thread fungus, and micelle bacterium reaches 50% ~ 80% of microbial total quantity, and hyphomycetic quantity accounts for 10% ~ 20% of microbial total quantity; When judging microbe population, be by microscopy and microscopic examination microbial bacterial situation, when micelle bacterium and thread fungus ratio lower than 50% time; usually by adding bacterial classification, the proportional amount of micelle bacterium can be improved, or reduce or stop wastewater treatment; micelle bacterium is cultivated, improves its content.
(7) the aerobic filtration of high-density: filler enrichment aerobic bacteria in the aerobic filtering basin body of high-density, the concentration of aerobic bacteria mud is 5000 mg/L ~ 8000 mg/L, such as: 5000 mg/L, 5500 mg/L, 6000 mg/L, 7000 mg/L, 8000 mg/L, clarified wastewater B is under the effect of this high-density aerobic bacteria, the organism for the treatment of step (6) non-complete oxidation, organism in clarified wastewater B is divided completely and takes off, obtain clarified wastewater C;
(8) whole heavy shallow lake: caused in flow lifting type settling tank by clarified wastewater C and precipitate, clarified wastewater C enters from body bottom, pond, after the Time Continuous water inlet of 8 ~ 12 hours, makes chemical oxygen demand (COD) in waste water drop to 50 mgO
2/ below L, going out water suspension is 10 below mg/L, obtains clarified wastewater D;
(9) advanced treatment is continued: cause sandfiltration pot by clarified wastewater D walking gained waste water, successively through meticulous quartz sand filtration with after charcoal absorption, get rid of the impurity in water, again through RO reverse osmosis equipment, remove charged ion in water, organism, colloidal particle and bacterium, obtain utilizing purify waste water or can the purifying waste water of reuse.This is purified waste water or can the matter performance index of purifying waste water of reuse: specific conductivity≤50 μ s/cm, pH value 6 ~ 8, suspended substance≤5 mg/L.
In the present invention, waste water takes jet or blower fan Air Exposure when pH value regulates, in step (2), flocculation medicament is the mixture of coagulating agent lime and polyacrylamide flocculant, the quality of coagulating agent lime accounts for 0.1 ~ 0.3% of composite waste A quality, and the quality of polyacrylamide accounts for 0.002 ~ 0.008% of composite waste A quality.
In the present invention, waste water takes jet or blower fan Air Exposure when pH value regulates.Flocculation agent is coagulating agent lime and flocculation agent polyacrylamide, and wherein wadding flocculation agent and waste water ratio are: 0.1 ~ 0.3% coagulating agent lime, 0.002 ~ 0.008% polyacrylamide.Such as: flocculation agent and wastewater room ratio be lime be added to by wastewater flow rate 0.1%, polypropylene milling amine is 0.002%, flocculation agent and wastewater room ratio be lime be added to by wastewater flow rate 0.2%, polypropylene milling amine is 0.008%, flocculation agent and wastewater room ratio be lime be added to by wastewater flow rate 0.3%, polypropylene milling amine is 0.006%.
Pressure-filtering process is realized by plate type pressure filter.
The equipment for the treatment of system in the present invention that completes comprises the Wastewater Pretreatment pond connected successively by water channel, mixing pit, preliminary sedimentation tank, secondary sedimentation basins, final deposition pool and continuation advanced treatment device, wherein, water channel is provided with valve, pH value proofing unit is provided with in described Wastewater Pretreatment pond, aerator is provided with in described mixing pit, whipping appts is provided with in described preliminary sedimentation tank, acidification hydrolization equipment is provided with after described secondary sedimentation basins, COD proofing unit and sludge filtration treatment unit, COD proofing unit is provided with in described final deposition pool, described continuation advanced treatment device includes RO reverse osmosis equipment.
The equipment for the treatment of system in the present invention that completes also includes control device, described control device is by circuit and valve, pH value proofing unit, aerator, whipping appts, acidification hydrolization equipment, and COD proofing unit, sludge filtration treatment unit and RO reverse osmosis equipment form control loop.
In process of production: by the trade effluent that produces in cutting mortar removal process first through Wastewater Pretreatment pond, by plate type pressure filter pre-treatment, filter out the suspended solids in water, reduce the solid suspension content in water.Again by all kinds of to acid washing water, soda-wash water etc. waste water, be mixed in proportion, pH value adjustment is carried out to waste water, make mixed waste water ph between 7 ~ 9, detected by pH value proofing unit, and adopt blower fan Air Exposure, all kinds of waste water is mixed.Then flocculation sediment process is carried out, in the waste water mixed after pH value adjustment, add a certain amount of flocculation agent respectively, and by whipping appts, suitable stirring is carried out to water body, make the de-steady cohesion of the material such as colloid, suspended solid disperseed in water body form precipitation, remove the colloid in waste water and suspended solid further.Waste water is through pre-treatment and flocculation sediment process, suspended substance in waste water reduces greatly, but the COD content in waste water is still very high, in order to reduce the COD content in waste water, eliminating useless Organic substance in water to the pollution of water body, further biochemical treatment is carried out to waste water, then anaerobic treatment and aerobic treatment is carried out, by this waste water through anaerobism and aerobic activated sludge process, reduce COD content in waste water, the useless Organic substance in water of abatement is to the pollution of water body.After anaerobic treatment, the COD clearance of waste water can reach more than 50%, and be next step in Aerobic, in waste water, the degraded of organic pollutant and the removal of COD provide guarantee.In Aerobic, according to the continuous aeration of the situation of Dissolved Oxygen in Water, water body is inflated evenly sufficient, supplement and support the long required oxygen of activated sludge bacteria all living creatures.By aerating wastewater process, waste water is fully contacted with aerobic sludge, under the condition of certain dissolved oxygen, the organism in waste water is removed, through aerobic treatment, the COD clearance of waste water can reach more than 90%.Waste water is after aerobic treatment, and part aerobic bacteria active sludge can be taken out of along with water outlet, this water outlet must be carried out secondary sedimentation.Waste water after aerobic treatment after secondary sedimentation basins precipitation process in waste water COD clearance can reach more than 90%, then to its process that is hydrolyzed, by the organism in acidification hydrolization waste water, reduce COD content in waste water further.Waste water COD after acidification hydrolization drops to 200 mg O
2/ below L, then carry out after high-density aerobic activated sludge filtration treatment through sludge filtration treatment unit, waste water flows into final deposition pool and carries out heavy shallow lake at end, and after heavy shallow lake is terminated eventually, in waste water, COD value can drop to 50 mg O
2/ below L, suspended substance value 10 below mg/L.In process, COD proofing unit is used to carry out check result.A large amount of trade effluents through above process after, directly can emit, but cause the wasting of resources, if but want this water to be applied to production, need to water quality proceed process.Carry out continuation advanced treatment again, make its meticulous quartz sand filtration through sand filter quartz sand and the charcoal absorption of charcoal canister, get rid of the impurity in water, RO reverse-osmosis treated is carried out again through RO reverse osmosis equipment, charged ion, organism, colloidal particle, bacterium etc. in water are effectively removed, being prepared into can the purifying waste water of reuse, and for industrial production, reaches the object of trade effluent cycling and reutilization.
Method and the step of embodiment 2 the present embodiment are equal to embodiment 1 substantially, difference is, the reagent adopted during flocculation sediment process is the mixture of coagulant polymeric aluminium chloride and polymeric ferric sulfate flocculant, the quality of coagulant polymeric aluminium chloride accounts for 0.1 ~ 0.3% of composite waste A quality, and such as 0. 1%, 0. 2%, 0. 3%.The quality of bodied ferric sulfate accounts for 0.01 ~ 0.03% of composite waste A quality, such as 0.01%, 0.02%, 0.03%.
The design of this industrial wastewater treatment system carries out according to the feature of crystalline silicon cutting waste mortar recycling industry, comprise the pre-treatment of native system, pH value regulates, flocculation sediment process, anaerobism, aerobic, acidification hydrolization, the aerobic filtration of high-density, flocculation sinks to the bottom process, secondary sedimentation, the a series of process in heavy shallow lake etc. eventually, all around the sector trade effluent suspension object height, waste water is containing acid-basicity, and COD content high water quality characteristics design, the complexity of Process Design is also because such water quality characteristics, and go out water suspension after process, pH value, COD content is also all up to standard.If other waste water, certainly also can process, but there is no need the so complexity designed, such as the waste water of below COD1000 perhaps requires no acidification hydrolization, the aerobic filtration of high-density, eventually heavy shallow lake operation, only just can reach the water quality standard of national regulations in secondary sedimentation place water quality.Even COD lower below 500, only need aerobic treatment, other variety of processes all need not, water outlet is just up to standard substantially.In like manner, if waste water SS value, namely suspension content value, do not have the industry so higher, pretreatment process does not also need.If waste water ph is all 6 ~ 8, then also need not designs pH value and regulate operation, the pH of direct water outlet is just up to standard.
In sum, the design of native system designs to adapt to the feature of this area water quality, comprise COD very high, there is acid and alkaline waste water, feature design that waste water suspension is high.If be used in other waste water of process, then that need not design is so complicated, and portion link can be processed to standard water discharge, according to the waste water quality situation that need process.Before wastewater treatment, water sample index is in table 1:
Testing index before table 1 silicon wafer mortar Industrial Wastewater Treatment
Table 2 silicon wafer mortar trade effluent utilizes the Testing index after the inventive method process
From above-mentioned table 1, table 2: 1, COD concentration is up to the waste water of 20000 mg/L, after present method process, COD value can drop to 50 below mg/L, and its COD clearance reaches more than 98%, exceedes the Effluent criteria of national Specification more than 60% clearance; 2, by acid waste water, alkaline waste water after treatment, pH value reaches 6 ~ 8, meets national regulation water quality standard; 3, by the waste water of high suspended matter content after treatment, SS value reaches 5 below mg/L, exceedes national regulation water quality standard.
According to standard GB/T 18918-----2002 regulation, the A standard of primary standard must be arrived as reuse water as urban wastewater treatment firm water outlet, i.e. COD≤50, SS value≤10, pH value 6 ~ 9.National regulations, when influent COD is greater than 350mg/L, should be greater than 60% index operative norm by clearance.Utilizing after present method process is purified waste water, and its COD value reaches the requirement of reuse water COD standard on data completely, and the COD of waste water is 3000 ~ 12000 mg/L, is greater than 350 mg/L, the regulation of COD clearance in operative norm.After present method process, its clearance reaches more than 98%, considerably beyond 60% requirement of national regulations.No matter press COD value and COD clearance, all reach the requirement of GB to reuse water.Suspended substance (SS value) reaches 5 mg/L in addition, exceedes national regulations 10 mg/L requirement.PH value meets the regulation of GB 6 ~ 9.
Waste water is after present method process, and the emission standard that COD value and SS value specify more than GB8978-1996, pH reaches standard.Concrete data see table 3:
The contrast of table 3 relevant criterion Testing index related to the present invention
Can be drawn by table 3, the result that treatment method draws, well beyond standard-required.
Change each the concrete parameter in above-described embodiment, multiple specific embodiment can be formed, be common variation range of the present invention, describe in detail no longer one by one at this.
Claims (1)
1. silicon wafer mortar reclaim in the treatment process of trade effluent, it is characterized in that: comprise the steps:
(1) Wastewater Pretreatment: the categorised collection after plate type pressure filter pre-treatment of the pickling waste waters produced in crystalline silicon cutting waste mortar recycling process, alkali-wash waste water and ion exchange resin flushing waste water is deposited, again pickling waste waters, alkali-wash waste water and ion exchange resin flushing waste water are mixed, obtain composite waste A, the volume ratio of described pickling waste waters, alkali-wash waste water and ion exchange resin flushing waste water is 1:0.5 ~ 1:1 ~ 1.5, then regulate composite waste pH value to 7 ~ 9, and Air Exposure is carried out to composite waste A;
(2) flocculation sediment process: add flocculation medicament in composite waste A, stirs 10 ~ 30 minutes with the condition of 30 ~ 60 revs/min, obtains composite waste B;
(3) anaerobic treatment: anerobe active sludge is mixed in composite waste B by the mass ratio of 0.5 ~ 3:100, to utilize anerobe active sludge that the larger molecular organics that this composite waste B middle-molecular-weihydroxyethyl is 200 ~ 1000 is degraded to molecular weight lower than the low molecule organic matter of 100, obtain composite waste C;
(4) aerobic treatment: under the aeration condition of dissolved oxygen content 0.2 ~ 0.5 mg/L, utilize with wastewater quality than the aerobic bacteria active sludge being 0.5 ~ 2:100 decompose 10 ~ 15 little time, the organism removed in composite waste C, obtain composite waste D;
(5) secondary sedimentation: in flow lifting type settling tank, secondary sedimentation is carried out to composite waste D, composite waste D enters from body bottom, pond, after the Time Continuous water inlet of 8 ~ 12 hours, removes precipitating sludge, obtains clarified wastewater A;
(6) acidification hydrolization: undergone microbial fermentation, decompose the small organic molecule, the methane and carbon dioxide gas that are converted into incomplete oxidation for 8 ~ 12 hours by each organism in upper step gained clarified wastewater A, to reduce chemical oxygen demand (COD) content to 200 mg O in clarified wastewater A
2/ below L, obtain clarified wastewater B, wherein, described microorganism is micelle bacterium and thread fungus, take thread fungus as skeleton, micelle bacterium is attached on thread fungus, and micelle bacterium proportion is greater than thread fungus, micelle bacterium reaches 50% ~ 80% of microbial total quantity, and hyphomycetic quantity accounts for 10% ~ 20% of microbial total quantity;
(7) the aerobic filtration of high-density: enrichment aerobic bacteria in filler in the aerobic filtering basin body of high-density, and make the concentration of the aerobic bacteria mud in the clarified wastewater B of introducing reach 5000 mg/L ~ 8000 mg/L, clarified wastewater B is under the effect of this high-density aerobic bacteria, the further oxygenolysis of organism of non-complete oxidation in step (6) is fallen, obtains clarified wastewater C;
(8) whole heavy shallow lake: caused in flow lifting type settling tank body bottom, clarified wastewater C pond and precipitate, after the Time Continuous water inlet of 8 ~ 12 hours, makes the chemical oxygen demand (COD) in waste water drop to 50 mg O
2/ below L, going out water suspension is 10 mg/below L, obtains clarified wastewater D;
(9) advanced treatment is continued: clarified wastewater D is caused sandfiltration pot, successively through the meticulous quartz sand filtration in sandfiltration pot with after charcoal absorption, get rid of the impurity in water, again through RO reverse osmosis equipment, remove charged ion in water, organism, colloidal particle and bacterium, obtain utilizing purify waste water or can the purifying waste water of reuse;
In step (2), flocculation medicament is the mixture of coagulating agent lime and polyacrylamide flocculant, in coagulating agent, the quality of lime accounts for 0.1 ~ 0.3% of composite waste A quality, the quality of polyacrylamide accounts for 0.002 ~ 0.008% of composite waste A quality, or flocculation medicament is the mixture of coagulant polymeric aluminium chloride and polymeric ferric sulfate flocculant, in coagulating agent, the quality of polymerize aluminum chloride accounts for 0.1 ~ 0.3% of composite waste A quality, and the quality of bodied ferric sulfate accounts for 0.01 ~ 0.03% of composite waste A quality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310387385.7A CN103408201B (en) | 2013-08-30 | 2013-08-30 | The treatment process of trade effluent during silicon wafer mortar reclaims |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310387385.7A CN103408201B (en) | 2013-08-30 | 2013-08-30 | The treatment process of trade effluent during silicon wafer mortar reclaims |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103408201A CN103408201A (en) | 2013-11-27 |
| CN103408201B true CN103408201B (en) | 2015-08-05 |
Family
ID=49601261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310387385.7A Expired - Fee Related CN103408201B (en) | 2013-08-30 | 2013-08-30 | The treatment process of trade effluent during silicon wafer mortar reclaims |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103408201B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104986916B (en) * | 2015-06-08 | 2017-10-17 | 河北先达环保工程有限公司 | A kind of papermaking coating waste water treatment process |
| CN105253989A (en) * | 2015-10-16 | 2016-01-20 | 巢湖市聚源机械有限公司 | Biological fermentation treating agent for sewage |
| CN106006901A (en) * | 2016-07-25 | 2016-10-12 | 马鞍山钢铁股份有限公司 | Method for reducing total suspended matter concentration of dust removal circulating water |
| CN113045118A (en) * | 2021-03-17 | 2021-06-29 | 青岛海以达环境能源科技有限公司 | Industrial wastewater circulating treatment system |
| CN113735383A (en) * | 2021-09-24 | 2021-12-03 | 江苏徐工工程机械研究院有限公司 | Multifunctional integrated sewage treatment system and method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010001796A1 (en) * | 2010-02-11 | 2011-08-11 | Voith Patent GmbH, 89522 | wastewater treatment plant |
| CN101973662B (en) * | 2010-09-17 | 2013-04-10 | 北京国环清华环境工程设计研究院有限公司 | Method and system for treating industrial wastewater of photovoltaic solar cell plates |
| CN202152309U (en) * | 2011-07-01 | 2012-02-29 | 北京中恒意美环境工程技术有限公司 | Complete set of modularized small-scale device for treatment of high-concentration organic wastewater |
| CN202744424U (en) * | 2012-08-03 | 2013-02-20 | 南京瑞洁特膜分离科技有限公司 | Polysilicon wastewater treatment device |
-
2013
- 2013-08-30 CN CN201310387385.7A patent/CN103408201B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN103408201A (en) | 2013-11-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103819049B (en) | A kind of sewage water treatment method and system | |
| CN103408201B (en) | The treatment process of trade effluent during silicon wafer mortar reclaims | |
| CN103508637B (en) | Traditional Chinese medicine wastewater treatment system and method for treating traditional Chinese medicine wastewater | |
| CN104291522A (en) | Method for treating industrial wastewater | |
| CN103435233B (en) | Equipment and method for recycling chemical fiber continuous-spinning wastewater | |
| CN111762970A (en) | Method for treating leachate of garbage transfer station | |
| CN204385021U (en) | A kind of system processing waste water of heat-engine plant | |
| CN105645662B (en) | The removing means and removal methods of hardly degraded organic substance in film-filter concentration liquid | |
| CN209853893U (en) | Landfill leachate's processing apparatus | |
| CN205368049U (en) | Sizing agent effluent treatment plant | |
| CN101659502B (en) | Method for treating waste leachate by utilizing high denitrification shared type Orbal oxidation ditch | |
| CN103896457B (en) | A kind of Fine Chemistry Wastewater treatment process | |
| CN211445406U (en) | Landfill leachate treatment device | |
| CN109607945B (en) | Method for improving biochemical efficiency of wastewater in photovoltaic and electronic industries | |
| CN208829505U (en) | After-treatment system of the Fine Chemistry Wastewater after MVR distills | |
| CN103253836B (en) | A kind of percolate deep purifying treatment unit and method | |
| WO2019236589A1 (en) | Combination of dissolved air flotation and fixed film bioreactor solutions | |
| CN1986460A (en) | Process of treating waste water from artificial leather base cloth production | |
| CN109502900A (en) | A kind of Pb-Zn deposits beneficiation wastewater treatment for reuse Processes and apparatus | |
| CN210559934U (en) | Pure oxygen aeration system for wastewater treatment | |
| CN210457853U (en) | Landfill leachate's processing apparatus | |
| CN214571358U (en) | Waste water treatment device for synthetic leather plant | |
| CN216236438U (en) | Pretreatment system for garbage extrusion leachate | |
| CN214571360U (en) | Wastewater treatment system | |
| CN216236576U (en) | Efficient treatment system for garbage squeezing water |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Kaifeng City yuwangtai District 475000 Henan Fine Chemical Industry Park Patentee after: HENAN XINDAXIN MATERIALS CO., LTD. Address before: Kaifeng City yuwangtai District 475000 Henan Fine Chemical Industry Park Patentee before: Henan Xindaxin Materials Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150805 Termination date: 20180830 |